Loom drop-box connection



June 24, 1930. c. .J. LINDEGREN LOOM DROP BOX CONNECTION Filed Jan. 15, 1929 Illlllllllllllllllllllll" I ill 6022f Cor/ zll/kmqm/z [vex surfaces 50 and i, respectively.

sion of the rod is of less-length than the vertical dimension of the nutas clearly shown in Fig. 3.

A further feature of my invention relates to the formation of the nut to permit the same to move through a slight angular motion within the pocket. .The bottom of the lower shuttle box and the oilset portion 42 of the strap are substantially parallel but I provide the nut with uppe and lower con- The width of the nut is also slightly less than the distance between the vertical walls i8 so that a slight angular movement of the shuttle box is permissible with respect to the nut 4;? without impairing the vertical positiveness of the lifter rod. It is preferable to have the rod 28 so located that it is substantially under the center of gravity of boxes so that the latter will be moved evenly when the lifter rod 28 is elevated or lowered.

In assembling my, improved construction the nut 47 is inserted in the pocket after which the upper end or": the rod is extended through an opening in the lower offset part 42 of the strap. The opening 52 is somewhat larger than the diameter of tl e rod 28. Sand rod is then turned tightly lnto thelnut, rotation of the latter being prevented by the side walls 28. The shoulder 4,6 is

forced against the under surface of the nut so that the nut and rod in effect become a unified structure.

"In operation the lifter rod :28 may be raised as previously stated, lifting motion being communicated from the rod through 1 lower surface 51 of the nut and the 'ofi'set part 42. As a matter of tact, however, the down motion is usually due to gravity and the lifter rod acts to limit downward mov.ement so that thecorrect shuttle box may be positively aligned with the lay. 7

If the shuttle boxes should be slightly out of alignment with the race plate the box rod 28 will not be subjectedtoany strain tending tobend the same due to the fact thatthe connect-ionbetween the nut 4:7 and the shut tle box parts will permit said nut to have a slight angular motion with respect to the shuttle boxes. Some loom fixers, for instance, consider that the shuttle box floor should "tip down slightlyso as to give the shuttle a downward motion tending to cause the same to fly closely to the race plate. Due to this and toot-her causes the shuttle boxes may not movejin a direction strictly parallel to the motion of the box red, but as previously stated the latter will be relieved from twisting and may therefore be made lighter and of less diameter than has been the practice heretofore.

is provided with convex upper and lower surfaces and that the shoulder 46 acts to keep the upper end of the threaded portion 45 of the rod below the top convex surface 50. v

Having thus described my invention it will be seen that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is: V i

1. In a loom having a shifting shuttle box and having'also a boxlifter rod to give the shuttle box plurality of positions relat-i vely to the lay, means defining a non-circular pocket on the under side of the shut-tle box, and a singular non-circular element secured to the box lifter rod and located loosely within the pocket and positioned to engage the side walls of the pocket, the upper surface of the element being convex and be ing the sole supporting connection between the lifter rod and the shuttle box.

2. In a loom having a shuttle box with a substantially flat bottom and a box lift-er rod to move the shuttle box to a plurality of positions, means defining a convex surface carried by the upper end of the rod to engage the bottom of the shuttle box and being the sole support for the latter, and a loose connection between the lifter rod and the shuttle box permitting limited angular movement of the shuttle box in all direc tions with respect to the lifter rod.

3. In a loom having a shuttle box with a substantially flat bottom and a box lifter rod to move the shuttle box to a pltu'ality of positions, a non-circular nutmounted on the upper end of the lifter rod and having a convex surface to en age the flat bottom of the shuttle box, and means defining a loose connection between the shuttle box and the lifter rod, whereby a slight angular rolling movement of the shuttle box over the upper surface of thenut'may take place.

4. In a loom having a shuttle box wit-ha substantially flat bottom and a box lifter. rod to move the shuttle box to adplural'ity of1positions,'means defining a convex surface on the upper end of the lifter rod to have rolling contact with the bottom of the shuttle box, and means .to restrict the angu lar movement of the shuttle box with re spect to the rod. r

5. In a loom having a shuttle box movable between a pair of spaced box guides, a box lifter rod movable to a plurality of vertical positions, means on said rod presenting a rounded upper surfacelocated substantially midway between the guides, and additional means on the shuttle box presenting a downwardly facing surface to engage the rounded surface, the \vei ht of the shuttle box being transmitted through said surfaces to the lifter rod.

6. In a loom having a shuttle box mov able between a pair of spaced box guides, a box lifter rod movable to a plurality of vertical positions, means on said road presenting a single convex upper surface located substantially midway between the guides,

and additional means on the shuttle box pre senting a downwardly facing surface to engage the single convex surface, the weight of the shuttle box being transmitted through said surfaces to the lifter rod.

7. In a loom having a shuttle box movable between a pair of spaced boxguides, a box lifter rod movable to a plurality of vertical positions, means on the bottom of the shuttle box defining a pocket, means on the top of the lifter rod presenting an upwardly facing rounded surface located in the socket and engaging the top of the pocket to afford the sole means of support for the shuttle box, said last named means being movable with a limited freedom in the pocket and the shuttle box and lifter rod being capable of slight angular movement. l

8. In a loom having a pair of; horizontally spacedvertical box guides, a shuttle box located between and movable vertically along the guides, a box lifter rod located between the guides and capable of assuming a plurality of vertical positions relatively to the 7 guides, and a single pivotal connection between the lifter rod and shuttle box supporting the weight of the shuttle box, the connection being so formed that the shuttle box is capable of slight angular motion relatively to the lifter rod in two vertical planes, one of said planes being transverse of and the other plane being substantially parallel to the horizontal-axis of the shuttle box.

In testimony whereof I have hereunto afiixed my signature.

CARL J. LINDEGREN; 

